DIY 3 in 1 DesignThis four-hole panel includes 2 QC 3.0 USB Charging Socket(Output: DC 18W Max) + 12V Power Socket (Output: DC 12V) + ON-OFF Toggle Switch, they are interchangeable. You can also replace any port with additional USB sockets or other suitable means. Two Waterproof QC3.0 USB PortsThe cigarette lighter socket comes with two 18W USB ports / 3A QC3.0.up to 4x faster than traditional chargers. Universal for all 12V-24V cars, buses, RVs, ATVs, trucks, trailers, boats. marine and more. Voltage Display & Safety DrivingDigital Voltmeter Display .The real-time LED voltmeter can remind you if the voltage is at a normal level to ensure safe driving. security. The blue light is perfect for nighttime use. Note: The voltage reading will not be visible until this outlet has power and the user has turned on the button. Flexible Charging1 cigarette lighter outlets are enough to use multiple portable devices simultaneously, such as GPS, Dashboard, DVD Player, FM Transmitter and other small devices in your 12V~24V vehicle. Independent Rocker SwitchUSB charger panel designed with independent on/off switch, which saves more electricity and prolongs product life. You also don't have to worry about draining any power. Product Description Material: ABS, Aluminum Plate Operating Voltage : DC 12V - 24V Dual USB Charger: DC 18W Max Power Outlet: DC 12V-24V Led Backlight: Blue Choose by yourself Can be assembled on the blank panel as you need; According to your request, place USB charger socket / cigarette lighter socket / rocker switch ( or other compatible products) to the most suitable position of the panel. Package Included: 1 * Three-Hole Panel Base 1 * Dual QC 3.0 USB Car Charger Socket 1*Cigarette Lighter Socket 1*ON-OFF Rocker Switch 4*Mounting Screws 7 * insulated terminals